15.6 - 11.7 = 3.9
3.9 ÷ 15.6 = .25
25% of change
In this case you would set it up as

(180 represents the degree of the triangle)
Add up like terms

Subtract 130 to the other side (180-130)

Divide 10 to the other side ( 50/10)
.

Hope this was clear :)
7.25(10) + 5.50p = 105.50
72.50 + 5.50p = 105.50
5.50p = 105.50 - 72.50
5.50p = 33
p = 33 / 5.50
p = 6 <=== there were 6 ride passes purchased
2(6.02*10^23)(3.35*10^-23)
2*6.02*3.35
answer : 4.0334*10^1
Answer:
it is 140ft perimeter is adding all four sides together